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Can someone address the hardness requirement of maximum 302HB for API pump shafts?

Do You think that is the main reason (HIC)? similar issue i saw in nuclear specification 302HB corresponding with 32HRC so that is no NACE requirement 22HRC.

Hello, I added my question on another group (API pumps), but I did no recive an answer. Maybe someone here will be able to help me. I have a question. API610 table H.2 for materials recommended for 12%Cr, do not use on hardened shafts (above 302 HB). (material groups 1.4021, 1.4005, 1.4005) In...

Hello, I have a question. API610 table H.2 for materials recommended for 12%Cr, do not use on hardened shafts (above 302 HB). (material groups 1.4021, 1.4005, 1.4005) In many applications we have seen this type of material used for the shaft, why doesn't API allow it?

Any help ? ;(

Hello, The api standard does not allow the use of axial clearances to balance axial thrust. Is it possible to use a balancing disc (axial clearances) to balance the axial thrust or not? Unless it is only possible for the application feed water pumps.

Hello, I asked this question on the API 610 forum but got no answer so I'll give it a try here. I have a question about the type of bushing material that should be used in VS pumps, e.g. VS4. API 610 recommends the material filled carbon for bowl shaft bushings. What about pumping gasoline...

Some kind of helpful not. Is it possible to wet the bushing with pumped liquid when pumping gasoline?

Hello, I have a question about the type of bushing material that should be used in VS pumps, e.g. VS4. API 610 recommends the material filled carbon for bowl shaft bushings. What about pumping gasoline, i.e. flammable liquid. What about wetting the bushings, is it enough to wet the pumped liquid...

What with Bronze

I have a problem with the choice of material for the line shaft bearing in vertical pump. The pump pumps liquid ammonia at -11. Previously, a PTFE bushing was used and the material was seized. Will you help in choosing the material? What kinde of material for line shaft bearing can we use for...

Hello, In APi 610, paragraph 9.3.6, the span between the shaft bushings is specified, but not directly the shaft length. It is not obvious that this sleeve determined single part of pump shaft, eg. 6m lenhgt shaft. What determined shaft lenght? Only technological possibilities? Thank You for reply.

GP240GH+QT is EN-10213-2 Chemical composition % of steel GP240GH (1.0619): EN 10213-2007 C Si Mn Ni P S Cr Mo V Cu 0.18 - 0.23 max 0.6 0.5 - 1.2 max 0.4 max 0.03 max 0.02 max 0.3 max 0.12 max 0.03 max 0.3

Can we use GP240GH+QT as Killed carbon steel? This is selection for pump casing for petroleum industry.

But what if the pump is installed in a coastal zone where the risk of corrosion arises from vapors sea salt in the atmosphere

I have a question. It is necessary to use shims between carbon steel baseplate and stainless steel pump? API610 (p.7.3.6.) there is that shims shall not be use under the pump, but what if there is a difference of potential between this two materials.

Artisi... It is not piracy. We are looking better, faster method to produce impellers with this same recurrences. Of for example pump has ten impellers and casts are with some difference.

I'm a producer, or rather I work for him ;-) The problem is that the customer would like such a welded impeller, suggesting that the accuracy of workmanship is better

I have Impeller specific speed nsq ~21 (SI units). b2=20mm (impeller outside width) d0=170mm (impeller eye diameter) d2=330mm (outside diameter) 7 - vanes

Artisi: Why? maybe because the workmanship and surface roughness of the machined impellers is better than cast I'm afraid that welding of narrow channels and vanes curvature may be difficult. Will welding not cause deformation of impeller?